EP3169201A1 - Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial - Google Patents

Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial

Info

Publication number
EP3169201A1
EP3169201A1 EP15738804.2A EP15738804A EP3169201A1 EP 3169201 A1 EP3169201 A1 EP 3169201A1 EP 15738804 A EP15738804 A EP 15738804A EP 3169201 A1 EP3169201 A1 EP 3169201A1
Authority
EP
European Patent Office
Prior art keywords
heater
water heater
phase
removable end
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15738804.2A
Other languages
German (de)
English (en)
Other versions
EP3169201B1 (fr
Inventor
Luke E. Kelly
John Ellison
Brian P. Mills
Christopher Williams
Brian RUTHERFORD
Stuart A. DIETZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BE Aerospace Inc
Original Assignee
BE Aerospace Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BE Aerospace Inc filed Critical BE Aerospace Inc
Publication of EP3169201A1 publication Critical patent/EP3169201A1/fr
Application granted granted Critical
Publication of EP3169201B1 publication Critical patent/EP3169201B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines
    • A47J31/542—Continuous-flow heaters
    • A47J31/545—Control or safety devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines
    • A47J31/542—Continuous-flow heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply

Definitions

  • Coffee makers are prevalent in many environments because of society's affection for the beverage, and thus many industries endeavor to offer their customers or patrons coffee as a way to make the experience more enjoyable. From automobile service stations to bookstores, there are few places where a customer cannot get a cup of coffee these days. One such place that patrons can expect a cup of hot coffee is during commercial airplane flights of medium to large distances. Passengers have come to expect this service on commercial flights, and airline manufacturers have developed special coffee brewing machines that meet the specific requirements and limitations of electrical appliances on aircraft.
  • All coffee brewing apparatus include some form of water heating element to raise the temperature of the water to a level where the oils and extracts of the coffee beans can be released.
  • Water is pumped through a tubing with a resistive heating element that heats the water as it flows through the tubing.
  • the resistive heating element is typically a coiled wire, similar to the element in an electric toaster, that heats up when electricity is run through it. In a resistive element like this, the coil is embedded in a plaster to make it more rugged.
  • the heating element serves multiple purposes, namely to initially raise the temperature of the supply water to brewing temperature, and then when the coffee is made, the heating element keeps the coffee warm.
  • the resistive heating element may be sandwiched between a warming plate and an aluminum water tube.
  • the resistive heating element presses directly against the underside of the warming plate, and white, heat-conductive materials such as grease make sure the heat transfers efficiently.
  • the coffee maker's power switch turns power to the heating element on and off, and to keep the heating element from overheating there are sensors and fuses. In coffee makers, sensors detect if the coil is getting too hot and, if so, paragraph
  • the present invention is directed to a flow-through type water heater for a beverage maker, and more particularly to a flow-through water heater for an aircraft galley appliance for making beverage, the appliance having three-phase power capability and a removable baffle core.
  • Most flow-through heating assemblies use a single phase power source to energize the heating element. Examples of such heating assemblies include plasma- sprayed circuit flow-through heaters from Watlow Electric Manufacturing Company of St. Louis, Missouri. These heaters receive a flow of water from a water supply and heat the water to a temperature that is appropriate for brewing coffees, teas, espressos, and the like. However, there are several characteristics of such heating units that make them unsuitable for use in aircraft.
  • the present invention is designed to overcome these shortcomings and provide a three-phase heating unit for an aircraft beverage maker that includes a removable lightweight baffle core that can be easily removed and inspected to determine if maintenance is required.
  • the heating unit includes integrated resistance temperature detectors (RTDs) that allow the actual heater temperature to be monitored directly, thereby avoiding an over-temperature condition, and incorporates fast-response temperature control.
  • RTDs resistance temperature detectors
  • the heating unit of the present invention uses a custom circuit for three-phase power to manage the unique power requirements of an aircraft while providing efficient power management.
  • FIG. 1 is an illustration of an assembled heater unit
  • FIG. 2 is an illustration of the components of the heater unit of FIG. 1;
  • FIG. 3 is a circuit diagram for a three-phase power supply used on an aircraft.
  • the present invention comprises enhancements to prior art plasma- sprayed circuit flow-through heaters to make such heaters suitable for aircraft beverage maker applications.
  • the enhancements include: 1) a high-performance, light weight plastic baffle core; 2) removable end fittings and baffle core, which allows for inspection of the core to check for hard water scale buildup inside the heater and enables maintenance and cleaning; 3) integrated RTDs, which allows the actual heater temperature to be monitored directly, thus avoiding an over-temperature situation and enabling fast-response temperature control in operation; and 4) a custom-designed circuit that incorporates three- phase power (essential for operation on aircraft) and dry steam production capability (particularly for espresso beverages) aboard aircraft.
  • the present invention is designed to be used in aircraft beverage makers with rapid in-line water heating and/or controlled steam production.
  • the traditional heater design for non-aircraft use incorporates a single-phase electrical circuit.
  • modern aircraft use a 400 Hz three-phase power supply to comply with FAA regulations.
  • the heater of the present invention includes a plasma-sprayed circuit applied to a stainless steel substrate tube.
  • Integrated resistance temperature detectors, or "RTD"s are incorporated into the heater circuit that enables direct monitoring of the heater temperature. This not only provides for better temperature control of the heater circuit, but allows for improved safety as well.
  • Figure 1 illustrates a fully assembled heating unit 10 of the present invention, with a three-way electrical conduit 12 that couple the heating unit 10 to a power supply (not shown).
  • a steel tube body 14 houses a plastic baffle core 16, and end fittings 18,20 are threaded or otherwise removably attached to allow access to the core 16.
  • a pair of O- rings 22 or washers are disposed between the end fittings 18,20 and the housing body 14.
  • At the end of the housing are three resettable temperature sensors 24a, 24b, 24c, one for each phase of the input power.
  • the three way electrical conduit 12 includes one jack 26 for each phase of the electrical power from the power supply, establishing a three-phase power system to convey the voltage to the heating unit 10 in three phases.
  • the removable end fittings 18,20 of the housing 14 preferably incorporate machined screw threads 28 that screw into tapped holes 30 on each end of the baffle core 16.
  • the end fittings 18,20 also have grooves on a mating surface that allow for seating and sealing of the end fittings when the unit 10 is assembled.
  • the ability to quickly and easily disassemble the heater 10 also allows for flexibility with various end fittings for functional efficiency and enables easier cleaning and maintenance.
  • FIG 2 illustrates an exploded view of the present invention of Figure 1, where the housing 14 is separated from the removable end pieces 18,20 and the plastic baffle core 16 is exposed.
  • Each fitting 18,20 inserts into the core 16, and water is heated by the resistive heater 32 inside the housing 14 as it is circulated around the core 16 from one end to the other.
  • Each end piece 18,20 includes a stem 38 that fits into fitted holes 30 at the opposite ends of the baffle core 16.
  • the inlet end piece 18 includes a port 40 for receiving a water stream, and the outlet end piece 20 includes a port 42 for the water to exit the heating unit 10.
  • a washer 22 is preferably incorporated into each end piece 18,20 to resist leakage at the junctures with the housing 14.
  • the core 16 may be made of plastic, such as PEEK, to reduce the weight of the core and thereby reduce the weight of the heating unit 10.
  • the pitch of the threads 28 on the baffle core 16 may be selected so as to allow the residence of the water in the heating unit 10 to coincide with the heating characteristics of the resistive heating element 32 to efficiently heat the water therein.
  • Figure 3 illustrates the plasma sprayed circuit 50 for the flow-through heater 10 of the present invention as incorporated into a brew heater.
  • the power supply (not shown) is a 115 volt, three-phase power each having 805 watt maximum, for an 2415 watt total single zone at an operating temperature of 195° F.
  • the wye configuration is shown in Figure 3, including phase C (blue) 52, phase B (yellow) 54, and phase A (red) 56.
  • the ground or heater return 58 is shown as well (white).
  • the housing 14 is preferably 155 mm, although other sizes are possible, and the wires can be selected to be approximately 12 inches in length.
  • the RTDs 24 (I Q., Class IB) are attached at the outlet end of the housing as shown in Figure 1.
  • the phases are each 533 watts for a total wattage of 1600 watts at an operating temperature of 300°F, which is used when the heater operates as both a water heater and a steam generator.
  • the three-phase heating unit for an aircraft beverage maker of the present invention incorporates a removable light-weight, easily removed baffle core allowing inspection of possible scale buildup in the heater.
  • the heating unit includes integrated resistance temperature detectors (RTDs) that allow the actual heater temperature to be monitored directly, thereby avoiding an over-temperature condition and fast response temperature control.
  • RTDs resistance temperature detectors
  • the heating unit of the present invention uses a custom circuit for three-phase power to manage the unique power requirements of an aircraft while providing efficient power management.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

L'invention concerne un dispositif de chauffage d'eau pour un appareil de préparation de boissons dans un aéronef comprenant une conduite électrique à trois voies (12) conduisant un courant électrique en trois phases séparées. Le dispositif de chauffage comporte un logement (14) comprenant un orifice d'entrée de fluide au niveau d'une première partie d'extrémité amovible (18) et un orifice de sortie de fluide (42) au niveau d'une seconde partie d'extrémité amovible (20). Une partie centrale cylindrique creuse comprend un élément chauffant enroulé autour de la partie centrale, et le logement comprend trois capteurs de température réglables au niveau de la sortie, chacun des trois capteurs de température réglables (24a, 24b, 24c) étant raccordé à une phase de courant séparée de la conduite électrique à trois voies.
EP15738804.2A 2014-07-03 2015-07-02 Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial Active EP3169201B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201462020803P 2014-07-03 2014-07-03
US14/754,641 US10524611B2 (en) 2014-07-03 2015-06-29 Multi-phase circuit flow-through heater for aerospace beverage maker
PCT/US2015/038975 WO2016004298A1 (fr) 2014-07-03 2015-07-02 Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial

Publications (2)

Publication Number Publication Date
EP3169201A1 true EP3169201A1 (fr) 2017-05-24
EP3169201B1 EP3169201B1 (fr) 2019-09-04

Family

ID=55016112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15738804.2A Active EP3169201B1 (fr) 2014-07-03 2015-07-02 Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial

Country Status (4)

Country Link
US (1) US10524611B2 (fr)
EP (1) EP3169201B1 (fr)
CN (1) CN106659327A (fr)
WO (1) WO2016004298A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10524611B2 (en) 2014-07-03 2020-01-07 B/E Aerospace, Inc. Multi-phase circuit flow-through heater for aerospace beverage maker
US11083329B2 (en) 2014-07-03 2021-08-10 B/E Aerospace, Inc. Multi-phase circuit flow-through heater for aerospace beverage maker
US11493233B2 (en) * 2016-09-26 2022-11-08 Stone Aerospace, Inc. Direct high voltage water heater
EP3366173B1 (fr) * 2017-01-07 2023-02-22 B/E Aerospace, Inc. Dispositif de chauffage à circulation directe à circuit polyphasé pour appareil de préparation de boissons aérospatial
US10583928B2 (en) 2017-04-10 2020-03-10 B/E Aerospace, Inc. Inline heater controller

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US10524611B2 (en) 2014-07-03 2020-01-07 B/E Aerospace, Inc. Multi-phase circuit flow-through heater for aerospace beverage maker

Also Published As

Publication number Publication date
CN106659327A (zh) 2017-05-10
US20160000262A1 (en) 2016-01-07
WO2016004298A1 (fr) 2016-01-07
EP3169201B1 (fr) 2019-09-04
US10524611B2 (en) 2020-01-07

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